Availability of Knives

In the 1950s my mother had one small kitchen knife and a carving knife.

In our kitchen, we have a block with a couple of assorted small knives, a medium sized knife and a carving knife.

Our children, who are in their mid-30s have designer sets of kitchen knives in their houses.

How many household knives are used in crime? The poor special constable in London was I believe killed with her own kitchen knife.